From 8944c67b1f61ca6a51a485772d5d1e6a8ff3d83d Mon Sep 17 00:00:00 2001
From: Denys Vlasenko <vda.linux@googlemail.com>
Date: Wed, 11 Jan 2017 14:22:00 +0100
Subject: [PATCH] hush: reinstate [[ builtin

Mike deleted it:

    commit 39456a18a104b228de240b265bd943251219849d
    Author: Mike Frysinger <vapier@gentoo.org>
    Date:   Sat Mar 28 12:21:57 2009 +0000

    stop lying about [[ test support

probably because it was not properly ifdefed around, and was enabled
even when bash compat is off.

I just tested it - it works:

$ [ *.diff = z.diff ]; echo $?
0
$ [[ *.diff = z.diff ]]; echo $?
1

Of course, not all numerous bash tricks of [[ ]] are implemented...

function                                             old     new   delta
bltins2                                               60      72     +12

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
---
 shell/hush.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/shell/hush.c b/shell/hush.c
index fb0321a2c..d90c1485a 100644
--- a/shell/hush.c
+++ b/shell/hush.c
@@ -1083,6 +1083,9 @@ static const struct built_in_command bltins2[] = {
 #if ENABLE_HUSH_TEST
 	BLTIN("["        , builtin_test    , NULL),
 #endif
+#if BASH_TEST2
+	BLTIN("[["       , builtin_test    , NULL),
+#endif
 #if ENABLE_HUSH_ECHO
 	BLTIN("echo"     , builtin_echo    , NULL),
 #endif